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Webex on Arch (64bit)
The main aim of this post just to help with installing webex on 64bit Arch by this method. Unfortunately package is outdated. Latest [Nov 12] version of archive could be found here.

So to build from sources:

wget https://www.dropbox.com/s/jsrbs07t5545x03/firefox32-20141112-1.src.tar.gz?dl=1 -O firefox32-20140714-1.src.tar.gz
tar xf firefox32-20140714-1.src.tar.gz && cd firefox32
sudo makepkg -s
sudo pacman -U firefox32-20140714-1-x86_64.pkg.tar.xz

To start 32-bit firefox:

firefox32